Method of treating milk.



S. R. KENNEDY; METHOD OF TREATING MILK. APPLIOATIQH rum) mm: 1. ie'oa.

Patented Septi20, 1910.

WITNESSES I TTORIIEY.

' Patent No, 772,517 issued October 18th 1904 for a-process'of making milk sugar. The

To all whom it may concern?- I UNITED STATES PATENT orr on.

SAMUEL RIDGWAY KENNEDY, OF PHILADELPH' PENNSYLVANIA.

METHOD OF TREATING MILK.

Application filed June 1, 1906. Serial No. 319,672.

Be it known that I, SAMUEL Rios-WAY KE NEDY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements inthe Method of Treating Milk, of which the following is-a specification.

My invention relates to the method of treating milk in removin the milk sugar and salts therefrom, and the facilitating ofthat process.

' The milk is first'condensed in an ordinary vacuum panto'about twenty one and a half 'Batim, though it may be condensed to a, higher degree-if desired as explained in my condensed milk is then cooled, preferably, by being runoverrefrigeratmg tubes, and

then allowed to stand unt'ilthe milk sugar and salts crystallize, as fully described in my patent above cited. The thick and gritty ;m1lk is now poured into a beating engine of any approved construction in which it .is stirred or beaten to reduce its viscosity or render it more fluid. The beating engine that .I have used, and upto the present time found most satisfactory, is illustrated in the drawing, in which- Figure l is an outside view, tical section, and Fig. 3 an enlarged perspective view of the paddle or beater.

It consists of a can A, which is jacketed or has double walls forming a space, a, 'in which brine or other cooling fluid may be circulated. In the center of the can, A, a shaft, B, is mounted having bearings at top and bottom, as shown; and on the shaft, B, a paddle, C, of propeller shape,is fastened, as shown; an outlet, (1, with a cock, (2,- is provided.

7), and, c, are the inlet andoutlet for the refrigerating fluid, and, D, is an opening through which the milk is poured into the can A.

After beating, the crystallized milk sugar and salts are filtered out, preferably by means of a centrifugal as described in my patent above referred to. By thus beating the mass of condensed milk before filtering,

lias for its object,

Fig. 2 a ver- I have found that it not only filters quicker ,and more easily, but more perfectly, thatis,

there does not appear to be so much fat, albumen or other material. adhere to the precipitated milk sugar andsalts as when the step of beating is omitted.

I am. not able to fully explain the reason for the reduction of viscosity by beating, but there can be no doubt of the fact. Apparently the condensed milk-especially at'ter. standing some time,'takes on an organic or crystalline structure or a structure of some kind, which is broken up by the beating allowing the material to flow much more freely, and loosening the fibers or par ticles which adhere to the crystals ofmilk sugar and salts. The advantage I have found in the particular form of beating engine illustrated in the drawing is that the propeller shape of paddle appears to work more easily, than any other sha e while being as elfective, and by beating on y the lower portion of the milk in the can A, it is rendered fluid and passes oil through the outlet d, allowing the up er. portions to fall and be beaten in turn, wl fen by continuing to supply material at the top, the process is rendered continuous.

Sometimes where milk has been allowed to stand for a great length of time, although the top portion may be poured oil the lower parts become very thick, in this case I sometimes add a little water to the thick portion before beating, perhaps half a gallon to one hundred pounds.

I-Iaving as above fully'described my invention and the best methods known to me of working the same, what I claim and dedensity, cooling it until the milk sugar and salts have crystallized, beating or agitatin it until the viscosity is sufiiciently reduce and filtering out the milk sugar and salts.

Specification of Letters Patent. Patented Sept. 20, 1910.

In tcstimon whereof I aflix my signature ,in presence 0 twov witnesses.

SAMUEL RIDGWAY KENNEDY. Witnesses: v

ALBERT EUGENE TAYLOR, JOHN Mrnnnn. i 

